Method of and apparatus for making dial-disks.



C. F. SIEMON.

METHOD OF AND APPARATUS FOR ING DIAL DISKS.

APPLICATION FILED JUL 1914.

1,147,979. Patented July 2" 15.

(Z I 1 2 SHEETS-SH 4 11m mu ATTORNEY C. F. SIEMON.

METHOD OF AND APPARATUS FOR MAKING DIAL DI SKS. APPLICATION FILED JULY 28. 1914.

1,147,979. Patented July 27, 1915.

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QW-f fi zu o WITNESSES: I nv VE/V TOR m GarZ 1? 15mm I BY ATTORNEY CARL FERDINAND STEMON, OF BRIDGEPORT, CONNECTICUT.

METHOD OF AND APPARATUS FOR MAKING- DIAL-DISKS.

Specification of Letters Patent.

Patented July 27, 1915.

Application filed July 28, 1914. Serial No. 853,688.

To all whom it may concern Be it knownthat I, CARL FERDINAND Sm- MON, a citizen of the United States, and a resident of Bridgeport, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in the Method of and Apparatus for Making Dial-Disks, of which the following is a specification.

This invention covers a novel method of making dial disks, and also a novel form of apparatus for carrying out this novel method. These dial disks are used in speedometers, cash-registers, and other inachines, and are disks having numerals, letters, figures or other characters printed or otherwise produced upon the periphery thereof. Heretofore, these disks have been made of celluloid, or of brass or steel or other metal, which renders them somewhat expensive, and the object of my invention therefore, is to produce a disk which shall be equally as good as, and more durable than the celluloid disk; one which can be more easily manufactured, and, one which is cheaper, both as to cost of material and method of manufacture.

With these objects in View the invention consists essentially in arrcnging a celluloid ring or band within a suitable die or mold, and then filling said ring or band with hard rubber or similar plastic material, combining with the ring or band, to provide a composite disk bearing the proper characters upon the periphery, these characters having been produced upon the celluloid ring or band in course of manufacture.

The invention consists also in certain further steps, and also in various details of construction and operation, all of which will be hereinafter described, and then pointed out in the claims.

In the drawings illustrating the invention, in the several figures of which like parts are similarly designated, Figure 1 is a diagrammatic perspective view of the platen and die, Fig. 2 is a sectional elevation of the platen and die or mold, the pin for producing the central opening in the disk and the celluloid ring or band forming the periphcry of the disk being set in place. Fig. 3 is a similar view showing a strip or band of rubber or other material in place around the pin. Fig. 4 is a similar view showing the platen lowered to complete the final step in making the disk. Fig. 5 is a perspeca ring or band A of celluloid or other suitable material, having numbers, letters, or other characters printed or otherwise produced upon the periphery thereof. The ring or band A is placed in a die or mold 1, having a confining recess 2 of a size to exactly receive the band or ring and of a depth substantially the Width of said band or ring. The recess 2 is surrounded by a second recess 8 having an inclined annular rib 4: rising from the bottom thereof which forms, with the straight wall 5 of the recess 2, a sharp cutting edge 6 which serves to cut off the surplus material which is received in the recess 3, the cutting and pressing operation being accomplished by a platen 7, co-acting with the die or mold 1, and having a perfectly fiat face except for a socket 8 formed therein to receive a pin 9 removably held in a socket 10 formed in the die centrally of the recess 2, and which serves to produce a central opening in the disk and as a handle for removing the disk from the die.

In the manufacture of the disk, a ring or band of celluloid A is first inserted in the recess 2, the pin 9 is then inserted in the socket 10 and then a strip of rubber or other plastic material B is wound or bunched around the pin so that when the platen descends and is brought into contact with the die or mold the plastic material will be fiattcned out, completely filling the recess 2 and forced into combining contact with the celluloid periphery which bears the desired characters. It of course, will be understood that when the body of the disk is formed of hard rubber the material is wound or bunched around the pin when in a plastic state. As the platen descends and forces the material into the recess 2 the surplus ma terial will be cut off by the cutting edge, and the severed surplusage, passes into the sur rounding recess 3. When the platen is raised the attendant then removes the disk from the recess by means of the pin 9, then knocks the disk from the pin and replaces the latter in its socket 10.

It will thus be seen that I produce a cen trally apei'tured hard rubber disk C hav ing a celluloid periphery bearing characters, and it will be noted that the method of making said disks, and the apparatus for carrying out said method are both cheap and simple, thus carrying out all of the objects, hereinbefore referred to.

WVhat I claim is 1. As a new article of manufacture, a dial disk, comprising a celluloid ring having characters arranged on its peripheral face, and a filling of hardening plastic material in intimate adhesive contact with the interior face of the ring.

2. As a new article of manufacture, a dial disk comprising a ring having characters arranged on its peripheral face, and a filling of hardening plastic material in intimate adhesive contact With the interior face of the ring, said material having a central opening.

3. As a new article of manufacture, a dial disk, comprising a celluloid ring having characters arranged on its peripheral face, 20 and a filling of hardening rubber in intimate adhesive contact with the interior face of the ring and having a central aperture.

In testimony whereof I have hereunto set my hand this 22nd day of July, A. D. 1914; 25

CARL FERDINAND SIEMON.

Witnesses:

GERTRUDE C. WHEELER, lVIARGIE H. BREETZ.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Yatents,

Washington, I). G. 

